What about Peach Garden Oath? W to gain 2 life per creature you control, it is Sorcery speed so if you don't like that there is always the WAY more expensive Dryad's Caress which also untaps all your guys.

Other then that, Pennon Blade, Might of the Masses, and other such effects could be good.

Haze of Rage would be good ... Dogpile could be cool if you zerg quick enough ...